"Do you think it's because..." She tries to think of a way to word this that won't be immediately insulting. Confined spaces and all. Well, confined by her standards. "DId it bother you? Killing-- whatever you killed?" She's hardly in a place to judge on that front, but that might be some part of the difference? Her face doesn't show any judgement, because there isn't any to show. There is a great number of dark deeds in her own personal ledger that don't bother her as much as they should, some that don't bother her at all. Being an absolute monster or being a good person, those are not the only two options in the universe. Whole lot of grey area. Natasha's comfortably at home in that grey.